Indoor Evaluation Experiment on Perception of Automated Driving System Marker Lamps

Akihiro Abe･Yoko Kato･Michiaki Sekine･Yoshiro Aoki (NALTEC)

In WP29, discussions are being held regarding the requirements for "Automated Driving System (ADS) Marker Lamp" that indicates the status of ADS. As a foundational study to develop technical requirements, this study used the lamps with blue-green chromaticity specified by SAE J3134 for evaluation and conducted indoor experiment to examine their visual perception. This study also examined the perception of both those lamps and other vehicle lamps when they were lit simultaneously.

Differences between Moving and Static Images in a Vehicle to Communicate Safety Messages to Drivers
-Discussion of Visual Messages Issued by V2X System-

Akira Ohtani･Ryohei Homma･Kotoe Udagawa･Iori Yamaguchi (JARI)･Masaaki Abe (JAMA)

This study examined the differences in drivers’ behaviours when information from the V2X system was presented in the form of moving images and static/pictogram ones. Thirty drivers participated in the driving simulator experiment, experiencing an event in which a vulnerable road user(VRU) suddenly appeared at an intersection while driving. The results showed that though their total glance time as gaze behaviours for the moving images were longer than for the static ones, there were no significant differences in other drivers’ behaviours between them. The visual presentation in V2X system was discussed in terms of drivers’ distraction and their adequate behaviours.

Usability Evaluation of a Gaze-Controlled Traffic Flow Monitor under Imperfect V2X Communication Environment

Yudai Tobinaga･Yoshiyuki Tanaka (Nagasaki University)

The authors have proposed a traffic flow monitor using V2X technology that allows drivers to check the traffic situation around their vehicle. In this presentation, we propose a new traffic-flow monitor that can move according to the driver's gaze point. A series of driving tests using a driving simulator are performed to validate the effectiveness of the proposed traffic flow monitor in an imperfect V2X environment according to the percentage of other vehicles displayed on the monitor.

Effect of Metaphor Design of AR-HUD for Route Guidance on Driver Judgement at Intersections

Taiki Kobayashi･Kazushi Nio･Tatsuru Daimon (Keio University)･Nobuyuki Nakano･Fumihito Inukai･Akira Tanaka･Tadashi Shibata (Panasonic Automotive Systems)･Daisuke Nagai (Panasonic ITS)

This study aims to investigate drivers' directional judgments and psychological aspects at intersections when using metaphor for route guidance of AR-HUD. In the VR experiment, experimental conditions were consisted of yaw and roll angles of the metaphors and the number of metaphors. Participants approached a left-turn intersection which was divided to three directions while experiencing various combinations of metaphor design of AR-HUD, and then asked to judge what direction the metaphor indicated. Experimental data were analyzed and evaluated in terms of reaction time and psychological aspects.

Application of Visual Cue Stimulus Continuously Inducing Gaze Direction on Safety Confirmation of Pedestrian in Turning Left at Signalized Intersection

Takahide I･Masanori Takemoto (Seikei University)

This study designed a dynamic visual cue stimulus, which was displayed the peripheral visual field of driver and induced gaze direction side by side continuously, to prevent insufficient safety confirmation. In the driving simulator experiment, for applying the visual cue stimulus to safety confirmation of crossing objects when turning left at signalized intersection, three kinds of experimental factors were prepared: degree for inducing gaze direction, direction of moving driver’s head, and amount of steering operation during safety confirmation. We analyzed the difference of effect for inducing gaze direction from one side to the other side in these three experimental factors.